9. Apocrine glands begin to function at puberty under hormonal influence. Where
ID: 3512238 • Letter: 9
Question
9. Apocrine glands begin to function at puberty under hormonal influence. Where would we find these glands in the human body? a. in all body regions and buried deep in the dermis b. beneath the flexure lines in the body c. in the palms of the hands and soles of the feet d. in the axillary and anogenital area 10. Sebum waterproofs and softens the skin, and also provides protection against a. overexposure to the sun b. overheating c. harmful bacteria d. abrasions or cuts to the skin 11. All are functions of skin except: a. physical and chemical barrier b. blood reservoir c. vitamin A production d. excretion 12. The integumentary system is protected by the action of immune cells. Which of the following cells serve this function? a. dendritic cells b. melanocytes c. keratinocytes d. tactile cells 13. Which muscles attached to hair follicles cause goose bumps? a. arrector integument b. arrector pili c. levator folliculi d. arrector folliculi 14. Which of the following contributes to dark skin colors? a. hemoglobin b. carotene c. keratin d. melanin 15. Hair and nails are modifications of the a. hypodermis b. dermis d. osseous tissue 16. Select the most correct statement concerning skin cancer a. Most tumors that arise on the skin are malignant. b. Squamous cell carcinomas arise from the stratum corneum. c. Basal cell carcinomas are least common but most malignant. d. Melanomas must be removed quickly to prevent them from metastasizing 17. Acne is a disorder associated with- a. sweat glands b. sebaceous glands c. mammary glands d. ceruminous glandsExplanation / Answer
9. d. In axilla and anogenital region - Apocrine glands are present in axilla, areola, nipple, eyelid nostril and anogenital region.
10. C. Harmful bacteria - sebum is slightly acidic and prevent invasion by microorganisms.
11. C. Synthesis of Vitamin A - it is obtained from diet.
12. A. Dendritic cell - these are antigen presenting cell ie they present antigen to immune cell.
13. B. Arrector pilli - these muscles are attached to hair follicles and their contraction cause hair to raise up.
14. D. Melanin - melanin are dark coloured pigment produced by melanocyte and is responsible for skin colour.
15. C. Epidermis - epidermis has keratin layer which is major component of hair and nail.
16. D. Melanoma must be removed - melanoma are most common akin tumor with very high tendency to metastatize.
17. B. Sabecious gland - when there is overproduction or block in secretion then it causes acne
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